Locking device for



LOCKING DEVICE FOR CASH REGISTERS, ETC

Filed Feb. 24, 1952 Patented July 24, 1934 ,T ES

.are

Hans Fredrik Birger Hiigfors, Stockholm, Sweden, assignor to Kooperativa Fiirbundet Fiirening U. P. 5., Stockholm, Sweden Application February 24, 1932, Serial No. 594,923 In Sweden January 29, 1932 1 Claim.

This invention relates toa locking device for cash registers and other apparatus giving receipts, on the amount paid, which device operates, when the paper used for printing the receipts is at an end. The device is characterized substantially in that the paper slides between a movable and a stationary part of the machine, the stationary part having a recess matching the movable part, the said movable part being adaptld ed to engage the recess, when the paper is at an end, and to look any member which stands in connection with the releasing pawl of the machine, sothat the same cannot be started.

An embodiment of the invention is shown on [8 the drawing in which Fig. 1 is a partial vertical sectional view and Fig. 2 is a front view of a detail shown in Fig. 1. The invention is here applied to cash registers with starting key. Only those parts of a cash register necessary for unzo derstanding the invention have been illustrated.

1 indicates the front side of the register and 2 the starting key, which is guided by means of pin and slot connections 3. A joint-lever 4 is actuated by the starting key, the said lever being roz5 tatable around a pin 5 and shaped as a pawl 6,

which in the resting or released position of the key serves for locking, by the influence of a spring 7, a lever 9 rotatable around a pin 8, the said lever serving as a revolution pawl for the m handle (not shown) mounted on the shaft 10.

The revolution pawl is actuated by a tension spring 11. To the shaft 10 of the handle is secured a cog wheel 12 engaging a cog wheel 13 on a shaft 14, which further supports a cam disk 15 35' cooperating with the revolution pawl 9.

The arrow 16 indicates the direction of rotation of the cog wheel 13 and the cam disk 15. The handle and, together with same, the wheel 12 are normally rotated two revolutions for each operation, during which the wheel 13 rotates one single revolution.

The strip of receipts is indicated by 17 and in usual manner the same runs over rollers (not shown) for winding off and winding up the strip.

L5 According to the invention a lever 19 is pivotally journalled around a shaft 18, the said lever being provided with a laterally bent arm 20 which, by its own weight, or by a spring or the like, is caused to rest against the paper strip 17. The

sd'paper for the receipts is preferably fed past a ni-when the paper for the receipts is at an end.

The lever 19 is provided with an arm 23, having a projection 24 adapted to engage a notch or a recess 25 of the starting key 2.

When the machine is to be released the starting key 2 is depressed, said key rotating the lever 4 so that the revolution pawl 9 is disengaged by the actuation of the spring 11, by which the cam disk 15 secured to the cog wheel 13 is adapted to be rotated freely in the direction of the arrow 16. The point 26 of the cam disk 15 will then in a known Way bring with it the arm 27 of the revolution pawl, so that the pawl i will again hold fast the revolution pawl 9, by which the machine stops, when the cog Wheel 15 has made one revolution.

During this revolution the paper 17 for the receipts moves close to the stationary part of the machine, for example to the plate 22 located on the stand 1 of the machine or rigidly connected to same and having a recess or opening 21. When the paper runs over the plate 22 the paper prevents the arm 26 from falling into the notch, but when, however the paper is at an end the arm 20 will fall into the notch and turn around the shaft 18, at which the projection 24 located at the other end 23 of the arm 19 falls into the recess 25 of the starting key 2 thus preventing the same from being depressed before the arm 19 is raised and is prevented from falling again into the opening 21 by inserting a new paper in the machine.

Other embodiments may also be thought of. The arm 19 can for instance be shaped so as to lock direct against the revolution pawl 9 for example in machines without starting key in which the release is efiected by turning the handle a little backwards, but the embodiment described above is more suitable the arm 19 looking the Starting key 2, and the impossibility of pressing in the same is a direct signal to the person using the machine that the paper is at an end.

The present invention is of advantage in electrically operated machines in that the starting key for closing the electric circuit to cause operation of such machines may be locked and thereby prevent closing of the electric circuit and operation of the machine when the paper strip is broken or exhausted.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is: I

In cash registers and other machines adapted to discharge paper receipts from a paper strip and provided with a starting key for effecting operation thereof, a plate for supporting said strip and having a lateral slot therein, a pivoted lever said plate the end of the short arm will enter the notch in the stem of the starting key to prevent the key being operated, and means including a journal for said lever for guiding the strip of paper over said plate whereby the arm in registry with said slot is prevented from entering the slot as long as the strip covers said slot.

HANS FREDRIK BIRGER HGGFORS. 

